Elastic single-component silicone sealant for indoor and outdoor use in contact to marble and natural stone, with 25% maximum movement tolerance. Neutral curing
For sealing joints and connecting joints in contact with marble and natural stone.
EVT Natural Stone HPM must not be used in aquarium construction, as mirror adhesive and in areas with direct food contact.
In underwater applications, especially accurate tooling is necessary (preparation of substrate; often primer necessary). Underwater joints must be checked in suitable time intervals and have to be reworked if necessary.
Not suited for plastics within general poor adhesion to silicones (eg PE, PP, PET).
Substrate pretreatment
The substrate must be dry, firm, and free of dust and grease (clean with isopropanol, if necessary). Porous substrates (e.g. concrete, plasterboard and untreated wood) must be primed. Before primer application, remove any cement slurry, mould release agents or impregnations. In renovation projects, old sealant remains of paint and loose material must be fully removed. On coated substrates (paints, lacquers), compatibility to the sealant must be tested.
The joint must always be provided with a suitable, correctly dimensioned joint backing (e.g. PE cord, rock wool) to prevent adhesion on three faces. To avoid contamination and to achieve a precise joint, we recommend masking the joint edges with adhesive tape before primer application and filling – especially when working with marble / natural stone.
Joint dimensions
Joint dimensions should be at least 5 x 5 mm for indoor and 10 x 8 mm (width x depth) for outdoor applications. With increasing joint width (up to 30 mm), joint depth should be roughly half the joint width. Make sure that triangular bevels have uniform sides of equal length with at least 7 mm bonding surface on each side.
Tooling
After applying the sealant with a suitable manual, battery-powered or pneumatic caulking gun, the sealant can be smoothed in the joint with water or with a neutral, non-staining water- based smoothing agent and a suitable tool (e.g. jointing trowel). Smoothing is not only recommended for optical reasons, but also establishes close contact and good adhesion to the substrate. Remove excess smoothing agent (risk of schlieren). Any adhesive tape used should be removed immediately after smoothing. We recommend the FS caulking gun and FS jointing trowel.
The function of the sealant can only be guaranteed if correctly applied in accordance with the technical recommendations given in this data sheet and in related standards. Sealant application in situations with strongly fluctuating temperatures (premature stressing of the sealant) must be avoided.
The sealant is compatible with many paints and lacquers. Owing to a large number of different coating systems on the market, own tests concerning adhesion and compatibility have to be performed prior to application. For example, it is known that alkyd resin-based paints may give discolouration in combination with neutral curing silicones. The sealant is not overpaintable,
Especially on powder-coated substrates, adhesion has to be tested carefully, since it can be affected negatively depending on the coating used (may even vary for different colours of the same brand of powder coating).
In contact with bituminous, tar- or plasticizer-releasing substrates (eg EPDM, neoprene, butyl), discolouration and/or loss of adhesion may occur.
Good ventilation must be provided during application and curing to allow curing by-products to evaporate. Low temperatures, low humidities and joint depths above 15 mm can retard skin formation and cure significantly.
Exposure to liquid (eg acid-based cleaning agents, strongly coloured liquids) or gaseous chemicals (eg. tobacco smoke) for longer periods can result in discolouration of the product, especially for light colours (white). In general, the mechanical properties of the sealant are not adversely affected.
Products with fungicide give additional protection against the mould to the joint. But, they can not supersede good housekeeping: It’s essential to keep the joint clean, dry and free from substances, that may serve as nutrition medium (eg soap residues, skin scales).
EVT Prime Colours are stocked on the list below. If you would like a specific RAL colour not listed on the items below, please contact us and we can advise lead time and cost. RAL colours listed are a non-stock item and delivery time is anything from next day to 2 weeks, to 6 weeks, depending on the stock from manufacture.
EVT Prime Colours may be used for sealing construction joints on most surfaces. Suitable for perimeter sealing of uPVC window frames, conservatories, coated wood, aluminium, metal, concrete, plaster and sanitary applications. For interior and exterior use.
EVT Prime Colours cures upon reaction with moisture, remains permanently elastic, is non-ageing, contains a biocide, is durable and non-paintable. An application test is recommended before use. Do not use on natural stone. Use EVT Natural Stone HPM for marble and natural stone applications.
Apply with a hand-operated, battery-operated or air pressure dispensing gun; then smooth the joint surface with the use of a trowel or your finger and Surface Finishing Agent.
RAL Colours:
1013 – Oyster White
1015 – Anemone
1019 – Grey Beige
2002 – Blood Red
3002 – Carmine Red
3011 – Brown Red
4008 – Signal Violet
5000 – Violet Blue
5001 – Green Blue
5003 – Sapphire Blue
5011 – Steel Blue
5014 – Pigeon Blue
6003 – Olive Blue
6005 – Moss Green
6007 – Bottle Green
6009 – Fir Green
6012 – Black Green
6015 – Black Olive
6019 – Pastel Green
6020 – Chrome Green
6021 – Pale Green
6028 – Pine Green
6033 – Mint Turquoise
7000 – Squirrel Grey
7001 – Silver Grey
7002 – Olive Green
7003 – Moss Green
7004 – Signal Grey
7005 – Mouse Grey
7006 – Beige Grey
7010 – Tarpaulin Grey
7011 – Iron Grey
7012 – Basalt Grey
7015 – Slate Grey
7016 – Anthracite Grey
7021 – Black Grey
7022 – Umbra Grey
7024 – Concrete Grey
7030 – Stone Grey
7032 – Pebble Grey
7033 – Cement Grey
7034 – Yellow Grey
7035 – Light Grey
7036 – Platinum Grey
7037 – Dusty Grey
7038 – Agate Grey
7039 – Quartz Grey
7040 – Window Grey
7042 – Traffic Grey A
7043 – Traffic Grey B
7044 – Silk Grey B
7045 – Tele Grey 1
7046 – Tele Grey 2
7047 – Tele Grey 4
8002 – Signal Brown
8004 – Cooper Brown
8014 – Sepia Brown
8016 – Mahogany Brown
8019 – Grey Brown
9001 – Cream
9002 – Grey White
9003 – Signal White
9006 – White Aluminium
9007 – Grey Aluminium
9010 – Pure White
9016 – Traffic White