Cleanroom sealant and adhesive, with very high initial adhesion. HIGHCARE cleanroom sealant is a high-quality, fast-curing, permanently elastic adhesive and joint sealant based on MS Polymer with very high initial adhesion.
Applications
HIGHCARE sealant has a very high initial strength and adheres without primer to almost all materials common in construction such as aluminum, galvanized and stainless steel, zinc, copper, natural stone, concrete, brick, cement-based cladding boards, full-core, wood, plaster, glass, glaze, various plastics. Very suitable for bonding and installation of safety glass in the banking industry, installation of cable ducts, mitered aluminum windows, mirrors. As a universal adhesive and joint sealant suitable for sealing seams, connection and movement joints. Extremely suitable for structural bonding of panels. Examples of applications are the vertical or horizontal bonding of:
Features
– Sealing and bonding
– Very high initial adhesion
– Rapid build-up of internal strength
– Very good adhesion to most building materials
– Adheres to damp substrates
– Solvent and isocyanate free
– Very strong
– Permanentlydelastic
– Does not cause corrosion in metal bonding applications
– For indoor and outdoor applications
– UV and weather resistant
– Suitable for natural stone
– Mildew resistant
– Paintable with most water- and solvent-based paints. Can be painted wet
on wet. After 48 hours the surface must be cleaned before overpainting. Prior testing is required. Alkyd paints require extended drying time.
Processing
Substrate: The substrate must be solid and sufficiently firm. The substrate does not have to be completely dry (earth-moist).
Pretreatment: The materials to be bonded must be clean, dust- and grease-free. If necessary, degrease with Top Cleaner, MEK, fire alcohol, ethanol. For highly absorbent substrates we recommend the use of Primer DL-2001. Adhesion tests are recommended. The user must himself check the suitability of the product for his application. Consult our technical service if necessary.
Application: Apply HIGHCARE sealant with the provided nozzle in beads or dots on the substrate or on the element to be bonded. The grooves should be applied in vertical bands. The material can still be corrected, then pressed firmly. For information on the distances between the adhesive beads see “Adhesive quantity”.
DL Chemicals recommends that a 3.2 mm space be maintained between the parts being bonded so that the adhesive is able to accommodate deformations (especially important in outdoor applications or under humid conditions). To achieve this space, spacer blocks or pieces of foam tape with a thickness of 3.2 mm can be used. If the adhesive layer does not have to absorb any or only minor mutual deformations between the building components, a thinner adhesive layer (minimum 1.5 mm) may suffice (for example, in interior applications).
Open time: Apply the part to be bonded as soon as possible, but at the latest within 10 minutes (depending on temperature and relative humidity). The material can still be corrected, then press firmly or tap lightly with a rubber hammer.
Cleaning: Any adhesive released along the edges can be removed with a putty knife. Uncured adhesive residues can be removed with Parasilico Cleaner, cured adhesive can be removed mechanically. If required, smooth with DL 100 or squeegee rubber.
Drying time and strength
HIGHCARE sealant combines the advantages of a tape with those of a reactive adhesive system:
– During assembly, HIGHCARE sealant has high adhesion and high internal strength. This makes it possible to work without temporary support structures or allows the bonded building components to be moved or worked on directly.
– After curing under the influence of humidity, HIGHCARE sealant is vulcanized into a permanently elastic and very strong adhesive bond.
Initial strength
The internal strength of HIGHCARE sealant immediately after application is such that bonding without clamps or temporary supports is possible:
Internal strength (direct) > 0.0015 N/mm2
Strength per m2 of adhesive surface > 1500 N (> 150 kg)
After one hour, the strength tripled:
Internal strength (after 60 minutes) > 0.0045 N/mm2
Strength per m2 of adhesive surface > 4500 N (> 450 kg)
After curing :
HIGHCARE sealant cures under the influence of air humidity to a permanently elastic and strong adhesive bond. The maximum tensile strength is > 1.5 N/mm2 the shear strength is 2-4 N/mm2 depending on the adhesive construction. See Technical Characteristics for additional information on strength properties.
Glue quantity
For initial bonding, the HIGHCARE sealant is applied in the form of adhesive beads or dots. By pressing the element to be bonded, the adhesive spreads between element and substrate. The final surface of the adhesive layer determines the strength of the bond, both initially and after curing.
The relationship between the dimensions of the adhesive bead and the final adhesive surface is determined by the surface structure of the parts to be bonded and, of course, by the final adhesive thickness. A triangular adhesive bead 9 mm wide and 9 mm high (approx. 40 mm2 in cross section) yields an adhesive width of 13 mm at a thickness of 3 mm on smooth materials. On uneven substrates, at a
minimum thickness of 3 mm, the adhesive width will correspond to about 10 mm. At an adhesive thickness of 1.5 mm, the widths are respectively 26 and approx. 20 mm. Apply the beads parallel to each other so that air moisture can reach the adhesive between the beads. Starting from a standard triangular bead of 9 mm wide and 9 mm high and – after pressing – adhesive thicknesses of 1.5 and 3 mm the following relation between bead distance and weight of the parts to be bonded can be determined. Flat bonding surfaces are assumed. Pre-testing is recommended. When bonding larger wall or ceiling elements, possible additional peel-off forces (e.g. due to curvature in the panels) must be taken into account.
Technical Characteristics
– Basic raw material : MS Polymer
– Curing system : by humidity
– Curing speed : 2.5 to 3 mm/24 hours at 23°C and 50% R.H.
– Number of components : 1
– Skin formation : 10 to 15 minutes at 23°C and 50% R.H.
– Specific gravity : approximately 1.56 g/ml (ISO-1183)
– Shore A : 55 (+/- 5) (ISO-868)
– Maximum allowable deformation : 25%
– Modulus at 100% elongation : 1,300 N/mm2 (ISO-8339-40)
– Modulus at break : 1,500 N/mm2 (ISO-8339-40)
– % elongation at break : 230% (ISO-8339-40)
– Solvent content : 0%
– Isocyanate content : 0%
– Dry matter content : approx. 100%
– Processing temperature from +5°C to +40°C, do not process below +5°C. – Temperature resistance -40°C to +90°C
– Moisture resistance : very good
– Frost stability : not susceptible to frost
Packaging & Color
25 tubes of 290 ml per box : white – black
Certificates
KOMO certificate with product certificate: HIGHCARE sealant
IKI report for use in hospitals as a sealant and adhesive.
Storage and stability
Store cool in closed container.
Opened packaging has a limited shelf life.
12 months in the unopened package at 23°C.