Q: What is a sealant?
A: A sealant is basically a viscous liquid that sets as a solid allowing it to be used as a barrier preventing water, smoke or dust getting in places they shouldn't. A classic example of a sealant being used around the home is a silicone waterproof sealant being used where the bath and the wall meet to stop water running into the gap causing problems such as leaks, damp and mould.
Q: How to apply roof sealant?
A: Roof Sealant normally comes in a paint tin and is applied by brush and when given 2- 3 coats it gives a waterproof seal and will extent the life of the existing roof. This is achieved because the roof membrane has elastic properties which allow it to expand and contract to its original shape without causing damage, it also reflects the the heat from the sun and protects from the weather.
Step by step guide to applying a roof sealant:
1. Inspect the roof for any cracks,tears or gaps as these will need fixing before any work can start.
2. Clean the roof using a pressure washer if available if not a stiff brush will do but make sure the moss and dirt are removed and the roof is clean enough to take the sealant. use a detergent then rinse thoroughly.
3. Leave the roof to dry completely.
4. Prime the roof to improve the adhesion for the final sealant coat.
5. Apply the Roof Sealant coat and allow to dry before adding another coat, apply 3 coats if necessary.
Q: How to remove silicone from clothes
A: A good way to remove the silicone from your clothes is to let the silicone harden and set and then it off. Remember not to spread the silicone too thinly or rub it into your fabric. this way it will peal off more easily. If your are still having problems try giving your clothes a good rub once the silicone has set.
Q: How to do silicone sealant remover?
A: Silicone Sealant Remover is normally made up of a thixotropic gel type substance used for removing unwanted cured silicone sealant. It will come as no surprise to hear that the silicone sealant remover is used in the refurbishment of sanitary ware, worktops, doors and window frames etc. if in doubt of what surfaces the remover can be used on always test the remover first on an inconspicuous place.
Firstly remove as much of the silicone as possible with a silicone removal tool of blade then smear the silicone sealant remover onto the remaining silicone generously and leave to penetrate for as long as the manufacturers instructions say then simple remove and wash down.
Q: What should be the Shelf life for each grade, and how you count the shelf life of sealents? Is that just counted after packing at China factory or counted after shipments reaches client's warehouse?
A: The shelf time for each sealant are 9 months. In fact, some factory mentioned that their products can keep for 12 months, we don’t do like that, we’re regular factory and should be responsible for our customers. It should stored at or below 27℃ in the original unopend containers, usable life of 9 month from the date of manufacture.
Q: What to do with the materials if it expires for Shelf life after importing from your company? Does it mean they can be recycled or can be used any other way to Mould, as for examples Rubber Mounded products, or one have to be destroyed if expired for shelf life? This is an important question from client here.
A: If the products are expired for shelf time, it means no use even sometimes you store in good condition and the products are valid we do not suggest you apply it. It is usually can not be recycled or make to be Mould. It’s up to you to destroy or not.
Q: If buy for 595ML/ 600 Grams Sausages, what will be the price for each grade compared to 300ML and drum packing?
A: Compared with 300ml cartridge, 590ml sausage one is cheaper than it because the pakage is cheaper.
And drum one is usually for two-component silicone sealant. If the customer need we can make for you with one-component sealant.
Q: Can you source for Automatic Cartridge Filling Machine for our client?
A: Yes, we can source for you because there is other customer also request for this. And our factory also need purchase it.
Q: Can you help us source for Cartridge making and printing machines or sources for cartridge suppliers from china?
A: Yes, we can. We have solid realation ship with somecartridge making and pringting machines suppliers in China. I'll check it for you, and give you the supplier's information when your client come.
Q: What should be the best Curing Time for Each grade of Silicon Sealent after applying in a cavity, seperately for Glass, STONE Facade as well as Composite Panels?
A: The best curing time for one component is 21 days, for two components 14days. It’ll be total sealed.
If you ask for track free time: for neutral silicone sealant is around one hour under the standard condition ( around 23℃,50%RH), for acid one it takes about 25minutes. It’s not according to the backing material but according to different sealant.
Q: How can the cure rate of silicone adhesives be shortened?
A: Silicone adhesives and sealants cure upon exposure to moisture. A particularly desirable cure cycle for silicone type adhesive/sealants involves exposure to 130-150°F and 95-100% relative humidity. Addition of moisture to the environment where the silicone bonding operation takes place, will greatly enhance the cure rate. Thinner sections of silicone adhesive/sealants cure faster than do thicker sections. A 1/8" thick section can cure within 24 hours. More time is required to fully cure thicker sections.
Q: How much adhesive is required for obtaining durable high strength bonds?
A: The amount of adhesive used should suffice to completely fill the gap between the two surfaces to be bonded. Use of excess adhesive is wasteful and requires an additional clean-up operation which further increases costs. Consult Master Bond for detailed recommendations.
Q: Does Baiyun offer electrically conductive adhesives?
A: Yes. Baiyun has developed a broad comprehensive line of electrically conductive adhesives which have very marked advantage over solder. Silver filled electrically conductive adhesives offer outstanding electrical conductivity as well as superior physical strength properties. Nickel filled systems are very economical to use and also have high physical strengths. Copper and graphite filled systems are also available for special uses. Electrically conductive two component adhesive formulations can be cured either at ambient or more quickly at various elevated temperatures. The one component systems must be cured at elevated temperatures.
Q: What Makes Silicones Special?
A: Silicones are the only organic/inorganic hybrid polymers that have been extensively commercialized. This is true for several important reasons.
The organic portion in poly(dimethylsiloxane) or PDMS – by far the most common silicone polymer – is the methyl group. The surface energy of any substance is a direct manifestation of the intermolecular forces between molecules. In the case of the methyl group, these forces are almost the weakest possible (only aliphatic fluorocarbon groups are lower).
The inorganic siloxane backbone is the most flexible polymer backbone available. This allows the methyl groups to be arranged and presented to their best effect. Consequently, PDMS provides one of the lowest-energy surfaces known. This results in a low-surface-energy polymer that can be bettered only by more expensive fluorocarbon polymers. It is this unique surface behavior that accounts for many silicone applications.
Adhesives, Emulsions, Antifoams, and Surfactants
In many applications it is critical for the silicone product to stick (adhere) to another material. Whether the silicone is used as a coating, sealant, or an adhesive, a low-surface-energy polymer is being “stuck” to another material, which is not an easy challenge. It is achieved by carefully designing and formulating silicone products that bond directly with the substrate.
Q: Can materials with different thermal expansion coefficients be effectively adhesively bonded?
A: Bonding substrates with such widely different thermal expansion coefficients as glass and aluminum or plastics and ceramics can be readily accomplished with properly selected adhesive compositions. Adhesives with compliant bond characteristics are the key for achieving high strength, durable bonds between such substrates. Baiyun offers quite a number of high strength structural adhesive compositions for such bonding requirements.
Q: How tight are bond line tolerances for assuring effective adhesive bonding?
A: Gap filling, solventless adhesive systems such as epoxies, polyurethanes and silicone materials are very tolerant of variations in bond line thickness. Master Bond formulations based on these and other polymer systems can produce high performance bonds with assemblies whose bonding surfaces have tolerances up to 20 mils and even more. Highest strengths are usually achieved when adhesive bonds range from 2-5 mils in thickness. Baiyun’s adhesive product line has been designed to offer optimal tolerances in permissible bond line thickness.
Q: How can the cure rate of silicone adhesives be shortened?
A: Silicone adhesives and sealants cure upon exposure to moisture. A particularly desirable cure cycle for silicone type adhesive/sealants involves exposure to 130-150°F and 95-100% relative humidity. Addition of moisture to the environment where the silicone bonding operation takes place, will greatly enhance the cure rate. Thinner sections of silicone adhesive/sealants cure faster than do thicker sections. A 1/8" thick section can cure within 24 hours. More time is required to fully cure thicker sections. Baiyun has developed a special silicone adhesive called MasterSil 711 which in thin sections solidifies in 3-5 minutes and cures significantly faster than do commercially marketed competitive products.
Q: How much adhesive is required for obtaining durable high strength bonds?
A: The amount of adhesive used should suffice to completely fill the gap between the two surfaces to be bonded. Use of excess adhesive is wasteful and requires an additional clean-up operation which further increases costs. Consult Baiyun Chemical for detailed recommendations.
Q: Are Baiyun Sealants available in special colors?
A: Baiyun Chemical can prepare its adhesives in most any desired color scheme. The specific color concentrates employed by Baiyun Chemical do not affect pertinent processing and performance parameters. Additionally Baiyun Chemical. offers a line of optically clear adhesives for use in optical and opto-electronic applications.
Q: What's the best way to remove silicone sealant smeared onto glass?
A: Try the methylated spirits (denatured alcohol) suggestion first. It's the mildest of the solvents suggested here. Lacquer thinner next--its alcohol with acetone and maybe a few other things. Goo gone is xylene-based and won't touch silicone. If nothing else works, MEK (methyl ethyl ketone) will remove the silicone, but it's pretty nasty. Turn on the bathroom fan and open all the windows. BTW, all these solvents are highly flammable.
Q: How long does it take for 100% silicone to set?
A: Depending on it's climate, 100% Silicone may set in approximately 24 hours.
Q: What Kind of Silicone Can I Use on an Aquarium?
A: Silicone rubber sealant is an essential tool for home aquarists. This versatile gel repairs leaks, seals seams and bonds objects without upsetting the chemical balance of the environment. Most aquarium-specific silicone is safe for freshwater and saltwater environments.
Material
Pure silicone rubber is safe for aquarium use. It is usually transparent straight out of the tube or turns clear upon drying to minimize its appearance.
Uses
Aquarium-safe silicone rubber seals cracks in glass and acrylic fish tanks and repairs leaks along seams. Experienced home aquarists also use sealant to construct homemade aquariums out of plate glass. Sealant is a useful tool for creating aquascapes: it can join rocks to form a cave or bond lightweight driftwood to a heavier object to prevent floating.
Flexibility
Once set and cured, aquarium-safe silicone will remain flexible to accommodate the water pressure in the aquarium. Its rubbery texture resists cracking from changes in temperature or immersion.
Safety
Silicone sealants sold in pet stores or aquarium supply shops usually have safety labels. These sealants will not leech chemicals or degrade in the water and are generally safe for freshwater and saltwater tanks. Sealants sold in hardware stores might not specify their safety for fish tanks and could contain toxins.
Types
In addition to silicone rubber gel, aquarium sealant is also sold in sticks of moldable epoxy putty and glues formulated for marine use.
Q: How to Apply Silicone Sealant?
A: Silicone can be quite a tricky sealant to apply evenly and neatly. Firstly cut the end of the nozzle off at roughly a 35 degree angle (cut the nozzle to the desired size depending on the application). Load the silicone tube into the silicone gun and, keeping the flat side of cut nozzle against the area, gently squeeze the trigger until silicone squirts out. Use an old cloth or toilet paper to practice using the silicone until you feel comfortable and get a feel for what your doing, then starting at one end of the bath or worktop work your way across in one constant squeeze of the trigger (good luck!).
...... and if sealing a bath?
Fill your bath 3/4 full with water before you start applying the silicone as the weight of the water can cause the bath to move. If you seal the bath with water in it, when you come to use the bath later on then the silicone will stretch enough and it wont lose its seal. Make sure though that you leave the water in the bath until the silicone has dried/cured (check the manufacturers instructions).
I recommend using an acrylic based bathroom sealant for the inexperienced user as it is water based and can easily be wiped up with water and unlike silicone the more you play around with it the better it can look! However I wouldn't recommended use this for shower areas that are constantly getting wet.
What is RTV Sealant?
RTV stands for "room temperature vulcanizing." These sealants form a complete seal between two pieces of material. RTV sealants are used in a variety of industries from automotive to electronics.
Types
There are two main types of RTV sealants: acrylic and silicon. Acrylic sealants are also available in adhesive forms.
Features
RTV sealants harden when left open to air. Acrylic RTV sealants can handle higher temperatures than silicon RTV sealants.
Function
RTV sealants bond together two pieces that are non-rigid. They also protect electronic pieces from touching to prevent electrical conduction between two parts.
Uses
In the automotive industry, RTV sealants are used to bond parts where high temperatures are not a factor, such as the intake manifold and engine block. The electronic industry uses RTV sealants to seal wires and adhere pieces to each other.
Safety
RTV sealants should never be used in areas of high temperatures unless specified on the product package. All components should be attached properly while the product is still wet.
Q: How do I make a tile stall water tight?
A: "First, make sure that the cement board is tight in the corners by applying a 100 percent silicone sealant before tiling," says Salvadore Vines, director of operations for kitchens and baths at Alure Home Improvements in Plainview. He says that the silicone comes in a caulking tube. "Don’t use a latex sealant because it’s not as watertight," he adds. "There are other types of sealants that can be applied with a brush that are easier to use if you have to cover a wide area."
Both kinds will seal corners and cracks and prevent water from penetrating.
After you tile, it’s time to grout. "Make sure the grout is mixed properly — a good consistency is similar to mayonnaise, because this can also impact the water tightness," says Vines. "Use a grout float, which is a rubberized tool to help you glide the grout on properly. Fill in all the voids consistently. After the grout dries, clean off the excess grout and residue by using a dry cloth. Buff off all the excess haze within 24- to 48 hours. After you finish, take a look for cracks in the grout or the tiles you might have missed."
If you see dark spots on the sheet rock outside the shower, it means that water has seeped in.
