ALSTONE SILICONE SEALANTS WS 789 & GP 300
                     ALSTONE SILICONE 
SEALANTS
WS 789 & GP 300
ABOUT US
Alstone Industires has made a mark for itself in Indian subcontinent for being the 
Largest and only Indian manufacturer of silicone sealant and silicone fluids.
Alstone Industires is the first company in India to manufacture Silicone Sealant. 
Alstone Industires purchased the German technology and state of the art machinery 
installed at its plant in Rajasthan and started production in 2011.
When people were wary of even thinking to produce silicone sealant manufacturer 
in India, there was one company that was slowly and relentlessly focusing and 
gathering skills to make this dream true. Now under the able guidance of its 
industry leaders and expert consultants with determined team , Alstone Industires 
has made its presence felt.
PRODUCT AND QUALITY
There are various variants of silicone sealant which are manufactured by Alstone 
Industires in India. They are widely used in the construction, automotive, 
decoration, rubber and electronic industries. Quality is always the first priority. The 
quality of raw material, intermediate and finished products are all well tested by 
our quality Control Team. Excellent equipment and strict management give 
assurance to the quality of the product
Our products have been approved by Military Engineering Service, Central Public 
Work Department, Public Works Department, Airport Authority Of India and many 
more prestigious clients. Our products are greatly appreciated by the customers. 
We will strive for each customer’s demand and provide the best service.
HOW TO APPLY SILICONE SEALANTS
STEP 1: CORRECT JOINT DESIGN:       Correct joint design minimizes stresses on the sealant, enables 
optimum sealant movement capability, facilitates sealant application and minimizes the potential 
for sealant splitting and voiding by enabling cure by-products to exit from the joint.
STEP :2 CLEAN AL JOINT SURFACES:      Substrate surfaces must be completely clean, dry and sound. 
Completely remove any loose debris and/or old sealant.
STEP :3 INSTALL BACKING MATERIAL:          Backer rod (eg. closed cell polyethylene type or open cell 
polyurethane foam type) or similar material
STEP 4: MASK ADJACENT SURFACES WITH MASKING TAPE:             Masking will ensure a clean, neat 
appearance and reduce clean up by protecting surrounding areas from excess sealant.
STEP 5: APPLYING SEALANT:* Cut tip off the cartridge.* Cut nozzle at 45° angle to the desired shape 
and size.* Place cartridge  caulking gun. * Apply sealant into the base of the joint so that it 
completely fills the joint, wetting both sides.
STEP 6: TOOL JOINT AND REMOVE MASKING TAPE:    Tool the surface of the joint immediately after 
sealant application to provide a smooth even finish and to ensure the sealant wets the sides of the 
joint. Remove masking tape immediately after tooling and before the sealant skins
WEATHER PROOFING SEALANT WS 789
DESCRIPTION
Alstone WS-789 silicone weather proofing sealant is one -part neutral cure, 
construction grade sealant that easily extrudes in any weather. It quickly cures 
at room temperature by reaction with moisture in the air to form a durable, 
flexible silicone rubber seal . It has medium modulus characteristics and 
excellent unprimed-adhesion to most construction materials. It is also suitable 
as a remedial sealant to replace failed organic sealants.
APPLICATION BENEFITS
Good weatherability
 Sealing of joint b/w acp sheets Excellent uv resistance
 Sealing of joint b/w glass panels Bonds most common construction materials 
without use of primer
Sealing of concrete or brick joint
Excellent recovery from extension and 
Sealing of wood,upvc joint etc compression
Ease of application – ready to use
TECHNICAL SPECIFICATION
PRODUCTS WS 789
CURE SYSTEM NEUTRAL
FORM PASTE
TOOLING TIME 25-30 MIN.
TACK FREE TIME >120
SPECIFIC GRAVITY 1.31
SHORE A HARDNESS 32-35
TENSILE STRENGTH 1.6 MPA
MAX. ELONGATION 500%
CURE RATE IMM/24 HOURS
SAGGING NON SAGGING
MOVEMENT CAPABILITY (+)/ (-) 50%
U.V. RESISTANCE EXCELLENT
SERVICE LIFE 10 + YEARS
TEMP. RESISTANCE -50 TO +100
WARRANTY AS PER APMS*
PROCEDURE
PACKING 300 ML/ 600 ML
BLACK, WHITE,
COLOURS CLEAR &
COLOUR OF
YOUR CHOICE
WS 789 WIDE RANGE OF COLOURS
ALSTONE Industries Pvt. Ltd. a renowned name in the Building material Industry has 
always believed in Innovation. With that kept in mind Alstone Industries is 
introducing its new innovation Color Silicone Sealant. 
Silicone Sealant as one of its main products, Alstone Industries has catered the India 
market extensively from North to South and East to West. While Silicone Sealants 
are generally available in basic colors i.e. Black and White, the management at 
Alstone Industries decided to give new life to Silicone Sealant with it's best in class 
R&D team who extensively dropped there comfort and dedicated themselves in 
order to keep bringing new innovations. Alstone Industries make Silicone Sealant is 
now available in market in more than 20 color options.
Color Silicone Sealant is a completely innovative product line that gives Architects, 
Fabricators, Contractors, Builders, Glass Fabricators etc. a new level of play field 
wherein they can use this product to give a seamless and beautiful look without 
compromising on designs.
GENERAL PURPOSE SILICONE SEALANT
GP 300
ALSTONE GP-300 Silicone Sealant is a High Grade cost effective, general purpose, 
acetic cure silicone sealant offering long term durability in general sealing and 
general glazing applications. It may be used to glaze, seal and fill joints on:
APPLICATIONS FEATURES
Windows Superior clarity.
Skylights Easy to use – one part, no mixing required. 
Signs Can be dispensed with an ordinary caulking gun.
 Internal/external fixtures and fittings Cures to a strong, flexible seal capable of 
Bathroom sanitary fittings withstanding movement in and around the 
joint.
Kitchen sink sealing
Acetic Cure; Fast Cure.
DIY Works
Can be applied in any season.
 Doors etc.
Non-slumping; can be used in vertical and 
overhead joints.
Choice of colors: Clear, White and Black.
TECHNICAL SPECIFICATION – GP 300
PRODUCTS GP 300
CURE SYSTEM ACETIC
FORM PASTE
TOOLING TIME 6-8 MIN.
TACK FREE TIME 15-20 MIN.
SPECIFIC GRAVITY 0.98
SHORE A HARDNESS 25
TENSILE STRENGTH 1.35 MIPA
MAX. ELONGATION 450%
CURE RATE 2MM/24 HOURS
SAGGING NON-SAGGING
MOVEMENT CAPABILITY (+)/(-) 25%
U.V. RESISTANCE AVERAGE
SERVICE LIFE 3 + YEARS
TEMP. RESISTANCE -45 TO +100
WARRANTY NOT APPLICABLE 
PACKING 280 ML. / 260ML.
BLACK, WHITE
COLOURS CLEAR
TECHNICAL SPEC. COMPARISON BETWEEN
                   WS 789 & GP 300
PRODUCTS GP 300 ws 789
CURE SYSTEM ACETIC NEUTRAL
FORM PASTE PASTE
TOOLING TIME 6-8 MIN. 25-30 MIN.
TACK FREE TIME 15-20 MIN. >120
SPECIFIC GRAVITY 0.98 1.31
SHORE A HARDNESS 25 32-35
TENSILE STRENGTH 1.35 MIPA 1.6 MPA
MAX. ELONGATION 450% 500%
CURE RATE 2MM/24 HOURS IMM/24 HOURS
SAGGING NON-SAGGING NON SAGGING
MOVEMENT CAPABILITY (+)/(-) 25% (+)/ (-) 50%
U.V. RESISTANCE AVERAGE EXCELLENT
SERVICE LIFE 3 + YEARS 10 + YEARS
TEMP. RESISTANCE -45 TO +100 -50 TO +100
AS PER APMS*
WARRANTY NOT APPLICABLE 
PROCEDURE
PACKING 280 ML. / 260ML. 300 ML/ 600 ML
BLACK, WHITE,
BLACK, WHITE CLEAR &
COLOURS CLEAR COLOUR OF
YOUR CHOICE
THANKS
2E/7, Block E 2, Jhandewalan Extension 
Jhandewalan, Delhi
[email protected]
9810846953
https://www.alstoneindia.in/